I'm curious what metrics are driving that behavior by Instacart shoppers. In my (entirely amateur/armchair) opinion, it would seem like the time you'd save by making an unapproved substitution wouldn't make up for the potential for negative reviews, which could get you driven off the platform entirely.

Maybe a majority of customers don't care enough about unapproved substitutions to review poorly? Though reading through this thread suggests otherwise. Maybe there's some other internal metrics which shoppers or Instacart have access to that incentivize poor substitutions in the name of speed?

Honest questions - I don't know anything about this business and it's interesting to me that it appears to be such a pervasive issue.